Mercedes-Benz Error Code P1487: How to Fix It

Medium 1-3 hours Medium Severity Verified June 2026
Error Code
P1487
Brand
Mercedes-Benz
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-3 hours
Mercedes-Benz error code P1487 indicates an adjustable charge motion fault in your engine's intake system. This error affects the variable intake manifold flaps that control airflow into the engine cylinders. While this sounds complex, many P1487 issues can be diagnosed and potentially fixed with basic automotive tools.
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Tools You'll Need

How to Fix Error Code P1487

  1. Safety First and Initial Preparation

    Never work on a hot engine. Always disconnect the battery before working on electrical components.
  2. Connect OBD2 Scanner and Retrieve Codes

  3. Locate the Intake Manifold

  4. Inspect Electrical Connections

    Use only electrical contact cleaner on electrical components - never use water or general cleaners.
  5. Check Vacuum Lines

  6. Test the Control Valve Actuator

  7. Inspect Intake Manifold Flaps

    Do not attempt to force stuck flaps as this can cause permanent damage.
  8. Clear Codes and Test Drive

Parts You May Need

Charge motion control valve actuator
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Electrical contact cleaner
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OBD2 diagnostic scanner
Check Price on Amazon
Charge motion control valve actuator
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Charge motion control valve actuator
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Charge motion control valve actuator
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Charge motion control valve actuator
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Charge motion control valve actuator
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
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When to Call a Professional

Call a Mercedes-Benz specialist or qualified mechanic if you find stuck intake manifold flaps, need manifold removal for cleaning, or if the error persists after replacing obvious faulty components. Professional diagnosis is also recommended if you're uncomfortable working with electrical systems or lack the proper diagnostic equipment.

Frequently Asked Questions

Can I drive with Mercedes-Benz error code P1487?
You can drive short distances, but the vehicle may experience reduced power and poor fuel economy. Avoid extended driving and get the issue diagnosed promptly to prevent potential engine damage.
What causes Mercedes-Benz P1487 error code?
Common causes include faulty charge motion control valve actuator, damaged vacuum lines, corroded electrical connections, carbon buildup on intake flaps, or mechanical binding of the intake manifold flaps.
How much does it cost to fix P1487 on a Mercedes-Benz?
Costs vary widely depending on the root cause. Simple fixes like replacing vacuum hoses cost $20-50, while actuator replacement ranges $200-400. Professional intake manifold cleaning can cost $300-600.
Will P1487 cause my Mercedes to fail emissions testing?
Yes, active error codes like P1487 will typically cause your vehicle to fail emissions testing. The code must be resolved and the system must pass readiness monitors before testing.